Spec Chapter 12 -- BMP Entity Bean, no need for SCBCD?

Hi Guys, As for spec Chapter 12, it's talking about BMP Entity Bean, I got 3 confusions: 1) BMP is not required for SCBCD, is it? if not requried, then we can skip Chapter 12, and why Chapter 12 exists?

2) We have CMP/BMP Entity Bean, CMT/BMT Entity Bean, but we only have CMT/BMT Session Bean, right? (Do we have CMP/BMP Session Bean?)

1) BMP is not required for SCBCD, is it? if not requried, then we can skip Chapter 12, and why Chapter 12 exists?

I don't think BMP contract is on the exam. There are things you do need to know about BMP (tx won't propagate into BMP bean and that sort of things). But the spec was not written for people preparing to take the exam. The spec has to cover everything, even things not in the exam.

2) We have CMP/BMP Entity Bean, CMT/BMT Entity Bean, but we only have CMT/BMT Session Bean, right? (Do we have CMP/BMP Session Bean?)

We DO NOT have BMT Entity Beans. Persistance is a concept only applicable to Entity Beans. In fact, that's the main diff between session and entity beans: entity beans are persistent! So we DO NOT have CMP/BMP Session beans.

3) Do we have CMP or BMP or CMT or BMT MessageDriven Bean?[/B]

The only persistent beans are Entity Beans, they are the only ones with CMP/BMP. Message driven Beans can be both CMT or BMT (just like session beans).

Hai Lin
Ranch Hand

Joined: May 23, 2004
Posts: 79

posted Jul 12, 2004 22:40:00

0

Lionel, Thanks a lot to clarify my confusions. You answer are straightforward and clear.